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Definition of ion

ion

/ˈaɪ.ən/
i · on
Adverb:ionically
•
Plural:ions
•
Adjective:ionic
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ion Lexical Profile

ion Game Scores & Validity

• noun

1

An atom or molecule with a net electric charge resulting from the loss or gain of one or more electrons.

Example

"Dissolving table salt in water separates the compound into positively charged sodium ions and negatively charged chloride ions."

• Rhymes for ion

• Nearby Words

iochroma
iodine
iodized
ion
ionic
ionizer
iora

Word Origin & Etymology

Coined in 1834 by the English physicist Michael Faraday from the Ancient Greek neuter present participle 'ion' (going), from 'ienai' (to go), referring to how charged particles move toward an electrode during electrolysis.

Cite this Entry

Wordmom. (2026). Definition of Ion. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/ion
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